/*
 * Copyright 2017 ~ 2025 the original author or authors. <wanglsir@gmail.com, 983708408@qq.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.wl4g.shell.cli.config;

import static com.wl4g.component.common.lang.Assert2.state;
import static java.lang.String.format;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import com.wl4g.shell.common.cli.HelpOptions;
import com.wl4g.shell.common.registry.ShellHandlerRegistrar;
import com.wl4g.shell.common.registry.TargetMethodWrapper;

/**
 * Shell CLI bean registrar
 * 
 * @author Wangl.sir &lt;wanglsir@gmail.com, 983708408@qq.com&gt;
 * @version v1.0 2019-5月3日
 * @since v1.0
 */
public class ClientShellHandlerRegistrar extends ShellHandlerRegistrar {
    private static final long serialVersionUID = -6852880158146389409L;

    /**
     * Local and remote registed shell target methods for help.
     */
    private final Map<String, HelpOptions> helpOptions = new ConcurrentHashMap<>(16);

    public static final ClientShellHandlerRegistrar getSingle() {
        return Holder.INSTANCE;
    }

    /**
     * Merge remote and local targetMethodWrapper
     * 
     * @param registed
     * @return
     */
    public ClientShellHandlerRegistrar merge(Map<String, TargetMethodWrapper> registed) {
        state(helpOptions.isEmpty(), "Remote server registed target methods is null");

        // Registion from local.
        getTargetMethods().forEach((argname, tm) -> {
            state(helpOptions.putIfAbsent(argname, tm.getOptions()) == null,
                    format("Already local registed commands: '%s'", argname));
        });

        // Registion from remote registed.
        registed.forEach((argname, tm) -> {
            state(helpOptions.putIfAbsent(argname, tm.getOptions()) == null, format(
                    "Already remote registed commands: '%s', It is recommended to replace the shell definition @ShellMethod(name=xx)",
                    argname));
        });

        return this;
    }

    public Map<String, HelpOptions> getHelpOptions() {
        return helpOptions;
    }

    private static final class Holder {
        final private static ClientShellHandlerRegistrar INSTANCE = new ClientShellHandlerRegistrar();
    }

}